JP2000030914A - Variable resistor for high voltage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable resistor for high voltage in which stable sure connection can be obtained between conductive rubber and the output terminal electrode of a substrate. SOLUTION: In the connecting member housing section 13 of an insulating case, a capacitor connecting terminal 61, conductive rubber 7, and an output line connecting member 8 are housed. The terminal 61 is passed through the rubber 7 and a substrate 2 in such a state that the flange section 6a at one end of the terminal 61 is brought into contact with the lower surface of the rubber 7, and the other end of the terminal 61 is protruded from the rear surface of the substrate 2. The rubber 7 is arranged in such a state that the rubber 7 is pressed against an output terminal electrode 23a formed on the surface of the substrate 2, and the output line connecting member 8 is housed in the housing section 13 in such a state that the spring section 82 of the member 8 is press-contacted with the flange section 6a of the terminal 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage variable resistor used for adjusting a focus voltage, a screen voltage and the like of a television receiver or the like.

[0002]

2. Description of the Related Art A high-voltage variable resistor used for adjusting a focus voltage or a screen voltage of a television receiver or the like includes a capacitor for static or dynamic focus connected to an output electrode of a focus voltage. is there.

FIG. 5 is a sectional view of a main part showing a connection structure of a focus voltage output section of such a conventional high voltage variable resistor. As shown in FIG.
The substrate 2 is housed and fixed in the housing, and a connection member housing 13 is provided at the base of the cylindrical output line holding unit 12 provided in the insulating case 1. The conductive rubber 7 is housed in the connection member housing 13 so as to be in contact with the output terminal electrode 23 formed on the surface of the substrate 2, and the spring 82 is pressed in contact with the conductive rubber 7. The output line connection member 8 is housed therein, and the capacitor connection terminal 6 is inserted into the conductive rubber 7 from the back side of the substrate 2. A capacitor (not shown) is connected to the capacitor connection terminal 6 and the substrate 2
Is filled with resin 5 on the back side. An output line for extracting a focus voltage from the output line holding unit 12 is inserted, and the core of the output line is held by a plurality of holding pieces 81 formed on the output line connecting member 8. By using the conductive rubber 7, this high-voltage variable resistor can connect the capacitor connecting terminal and the output line connecting member for output without soldering, and arrange both at the same position on the substrate. Thus, the size is reduced.

[0004]

However, in the conventional high-voltage variable resistor as described above, when the capacitor connecting terminal is inserted into the conductive rubber, the capacitor connecting terminal pushes down the conductive rubber and the substrate is pressed down. A gap is created between the output terminal electrode formed on the substrate and the resin filled on the back side of the board passes through the through hole for insertion of the capacitor connection terminal, and the output electrode contacts the conductive rubber. In some cases, the contact between the output electrode and the conductive rubber becomes unstable or the connection does not conduct, resulting in poor connection.

Accordingly, an object of the present invention is to provide a high-voltage variable resistor capable of obtaining a stable and reliable connection between a conductive rubber and an output terminal electrode.

[0006]

To achieve the above object, a high voltage variable resistor according to claim 1 of the present invention comprises: a substrate having a surface on which a resistor and an output terminal electrode are formed; A rotating shaft having a slider that slides on the top, a one-sided open insulating case in which the rotating shaft is bearing, and the substrate is housed and fixed so that the surface faces the inner bottom portion; A conductive rubber held in the case and arranged so as to press and contact the output terminal electrode, a flange portion is formed at the tip, and the conductive rubber and the substrate are inserted from the surface side of the substrate and inserted. A capacitor connecting terminal disposed so as to sandwich the conductive rubber between the flange portion and the substrate; a spring portion that presses and contacts the flange portion of the capacitor connecting terminal; and an inserted output line. The holding piece An output line connected member held in the case, is characterized in that and a resin filled in the back side of the substrate.

According to the above arrangement, the capacitor connecting terminal is inserted through the conductive rubber and the substrate from the front side of the substrate, and the conductive rubber is connected to the capacitor connecting terminal pressed by the output line connecting member. Since it is arranged to be sandwiched between the flange and the substrate, no force is applied to separate the conductive rubber from the output terminal electrode when the capacitor connection terminal is inserted, and no external force is applied to the capacitor connection terminal after assembly. Even if the conductive rubber is added, the conductive rubber does not separate from the output terminal electrode, and the conductive rubber does not deform or displace. Therefore, a stable and reliable connection between the conductive rubber and the output terminal electrode can be obtained.

The high-voltage variable resistor according to the present invention comprises:
Since the output terminal electrode is connected to the output line connection member and the capacitor connection terminal via conductive rubber, the high-voltage output section can be connected without soldering, and the output is provided at the same position on the board. The connection portion between the line connection member and the capacitor connection terminal can be arranged, and the configuration is such that the size of the substrate is reduced, and the size of the high-voltage variable resistor is reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high voltage variable resistor according to one embodiment of the present invention will be described below with reference to FIGS. FIG.
(A) is a side view of the high-voltage variable resistor, (b) is a front view,
(C) is a rear view. FIG. 2 is a cross-sectional view taken along line XX of FIG. 1B, and is a cross-sectional view of a main part of a focus voltage output unit. FIG. 3 is a plan view showing the surface of the substrate, and FIG. 4 is a perspective view of a capacitor connecting terminal. In FIG. 1A, the lead wires of the capacitor are not shown, and in FIG. 2, the lead wires of the capacitor and the capacitor are not shown.

The high-voltage variable resistor according to the present embodiment is a so-called double-focus type which outputs two kinds of focus voltages and one screen voltage. A substrate 2 made of alumina or the like is adhered and fixed to the formed step, and a cylindrical bearing 11a provided on the front surface of the insulating case 1 is provided.
11b, 11c is a rotating shaft 4 on which the slider 3 is attached.
a, 4b, and 4c are bearings, and capacitor connection terminals 61 and 62, a high voltage input terminal 63, and a ground terminal 64 are led out on the back side of the substrate 2, and connected to these predetermined terminals to form capacitors C1 and C2. The substrate 2 is placed, and the back surface of the substrate 2 is filled with an epoxy resin 5.

The insulating case 1 has output line holding parts 12a, 1
2b and 12c are integrally formed, and each output line holding portion 12
At the roots of a, 12b, and 12c, connection member housings 13 are provided, each surrounded by an isolation wall.

As shown in FIG. 3, on the surface of the substrate 2, first and second variable resistors 21a for adjusting the focus voltage are provided.
21b, a resistor 21 including a screen voltage adjusting variable resistor 21c, first and second focus voltage output electrodes 22a and 22b, and a screen voltage output electrode 2
2c, output terminal electrodes 23a, 23b, 23c connected to the output electrodes 22a, 22b, 22c, input terminal electrodes 24 connected to the resistor 21, and a ground terminal electrode 25 are formed. At substantially the center of the terminal electrodes 23a, 23b, 24 and 25, through holes for inserting the terminals 61, 62, 63 and 64 are provided. One end of each slider 3 has a corresponding arc-shaped variable resistance section 21a, 21a.
b, 21c.

The capacitor connecting terminals 61 and 62 are obtained by cutting a linear conductor having a circular cross section into a predetermined length.
As shown in FIG. 4, a disk-shaped flange 6a formed by header processing or the like is formed at one end. The conductive rubber 7 is provided with a through hole through which the capacitor connection terminal 61 is inserted. The diameter of this through hole is formed slightly smaller than the wire diameter of the capacitor connection terminal in order to obtain more stable and reliable conduction.

As shown in FIG. 2, a capacitor connecting terminal 61, a conductive rubber 7, and an output line connecting member 8 are housed in a connecting member housing portion 13 corresponding to the output line holding portion 12a of the insulating case 1. I have. The capacitor connection terminal 61 is inserted through the conductive rubber 7 and the substrate 2, one end of which has a flange 6 a in contact with the lower surface of the conductive rubber 7, and the other end protruding from the back surface of the substrate 2. The conductive rubber 7 is disposed so as to press against the output terminal electrode 23 a formed on the surface of the substrate 2, and the output line connecting member 8 is arranged such that the spring 82 presses against the flange 6 a of the capacitor connecting terminal 61. It is stored. That is, the conductive rubber 7 is connected to the flange 6 a of the capacitor connection terminal 61 pressed by the output line connection member 8 and the substrate 2.
And it is stored and fixed.

To attach the capacitor connecting terminal 61, first insert the capacitor connecting terminal 61 into the conductive rubber 7,
Next, the conductive rubber 7 is inserted into the through-hole provided in the output terminal electrode 23 from the surface side of the substrate 2, and then the conductive rubber 7 is
3 so that the substrate 2 is pressed against the insulating case 1 and bonded and fixed with an adhesive.

Although not shown, the conductive rubber 7 is also connected to the output member holding portion corresponding to the output line holding portion 12b, similarly to the configuration of the connection member storage portion 13 corresponding to the output line holding portion 12a. It is stored and fixed by being sandwiched between the flange 6 a of the capacitor connection terminal 62 pressed by the connection member 8 and the substrate 2.

In the above-described embodiment, the capacitor connection terminal 61 is described as a straight one. However, the present invention is not limited to this. After the capacitor connection terminal is inserted into the substrate, the capacitor connection terminal 61 shown in FIG. As shown, a part may be bent along the back surface of the substrate.

Input terminal electrode 24 and ground terminal electrode 25
Are connected to an input terminal 63 and a ground terminal 64 by soldering, respectively. Note that a conductive rubber housing for an input terminal and a ground terminal may be provided in the insulating case 1 and the input terminal and the ground terminal may be connected by a conductive rubber. In this case, all electrical connections can be made without soldering.

The capacitor C1 is a capacitor for dynamic focus. One lead terminal is connected to the capacitor connection terminal 61, and the other lead terminal is connected to a parabolic waveform signal terminal (not shown). The capacitor C2 is a capacitor for static use. One lead terminal is connected to the capacitor connection terminal 62, and the other lead terminal is connected to the ground terminal 64. The filling and curing of the resin 5 is performed by the condenser C1 and the condenser C2.
It may be before or after mounting.

The output line connecting member 8 is formed by stamping a flat metal plate. The output line connecting member 8 includes a plurality of holding pieces 81 for holding a core of the output line, and a spring portion 8 bent in a curved shape.
2 is provided. Output line holding units 12a, 12
b indicates an output line for extracting the first and second focus voltages,
An output line for extracting a screen voltage is inserted into the output line holding unit 12c, and a core wire of each of the inserted output lines is held between holding pieces 81 of each output line connecting member 8, and each output line is connected to the output line holding unit 12a. , 12b, 12c.

As described above, in the high-voltage variable resistor according to the present embodiment, the capacitor connecting terminals 61 and 62 are inserted from the front side of the substrate 2 through the conductive rubber 7 and the substrate 2. When the capacitor connecting terminals 61 and 62 are inserted, no force is applied to separate the conductive rubber 7 from the output terminal electrodes 23a and 23b, and the connecting surface of the conductive rubber 7 with the output terminal electrodes 23a and 23b is not deformed. There is no gap. Therefore, the resin 5 filled on the back side of the substrate 2 does not enter the connection surface between the output terminal electrodes 23a and 23b and the conductive rubber 7 from the through holes for inserting the capacitor connection terminals 61 and 62, and the resin 5 There is no connection failure caused by the inflow of air.

Further, the conductive rubber 7 is disposed so as to be sandwiched between the flange 6a of the capacitor connection terminals 61 and 62 and the substrate 2, and the capacitor connection terminals 61 and 62 are provided.
Is pressed by the output line connecting member 8,
Even if an external force is applied to the capacitor connection terminal after assembly, the conductive rubber 7 does not separate from the output terminal electrodes 23a and 23b, and the conductive rubber 7 does not shift in position.
Stable and reliable connection continuity is always maintained.

In the above embodiment, the capacitor connected to the output terminal electrode has been described as being arranged on the back surface of the substrate. However, the present invention is not limited to this. The capacitor may be housed in the section, or a capacitor disposed outside the high-voltage variable resistor may be connected to the capacitor connection terminal.

In the above embodiment, the description has been given of the high-voltage variable resistor that outputs two focus voltages and one screen voltage. However, the present invention is not limited to this, and at least one focus voltage or at least one screen voltage is output. The present invention can be applied to a high-voltage variable resistor.

[0025]

As described above, in the high-voltage variable resistor according to the present invention, the capacitor connecting terminal is inserted through the conductive rubber and the substrate from the surface side of the substrate, and the conductive rubber is connected to the output terminal. Since it is arranged to be sandwiched between the flange of the capacitor connection terminal pressed by the wire connection member and the substrate, a force that separates the conductive rubber from the output terminal electrode when the capacitor connection terminal is inserted may be applied. Not
Also, even if external force is applied to the capacitor connection terminal after assembly, the conductive rubber does not separate from the output terminal electrode,
There is no deformation or displacement of the conductive rubber.

Therefore, according to the present invention, a stable and reliable connection between the conductive rubber and the output terminal electrode can be obtained, and a connection failure caused by the inflow of the resin can be reliably prevented.

[Brief description of the drawings]

1A is a side view of a high-voltage variable resistor according to an embodiment of the present invention, FIG. 1B is a front view, and FIG.
Is a rear view.

FIG. 2 is a sectional view taken along line XX of FIG. 1 (b).

FIG. 3 is a plan view illustrating a surface of a substrate according to an embodiment of the present invention.

FIG. 4 is a perspective view of a capacitor connection terminal according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing a connection structure of a high-voltage output unit of a conventional high-voltage variable resistor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation case 12a, 12b, 12c Output line holding part 13 Connection member accommodation part 2 Board 23a, 23b Output terminal electrode 3 Slider 4a, 4b, 4c Rotation axis 5 Resin 61, 62 Capacitor connection terminal 6a Flange part 7 Conduction Rubber 8 Output line connecting member 81 Nipping piece 82 Spring part C1, C2 Capacitor

Claims (1)

[Claims] A substrate having a resistor and an output terminal electrode formed on a surface thereof; a rotating shaft having a slider that slides on the resistor; a rotating shaft bearing the bearing; A one-sided open insulating case housed and fixed so that the surface faces the inner bottom part; a conductive rubber held in the insulating case and arranged to be in pressure contact with the output terminal electrode; A portion is formed, the conductive rubber and the substrate are inserted and inserted from the surface side of the substrate, and the capacitor connection terminal and the capacitor connection terminal are arranged so as to sandwich the conductive rubber between the flange portion and the substrate. A spring portion that presses and contacts the flange portion of the capacitor connection terminal, and a holding piece that holds the inserted output line; an output line connection member held in the insulating case; and a back side of the substrate. And a resin filled in High-voltage variable resistor, characterized in that.